Quarter	US dollars
1999-09-30	48
1999-12-31	68
2000-03-31	64
2000-06-30	59
2000-09-30	34
2000-12-31	33
2001-03-31	38
2001-06-30	32
2001-09-30	29
2001-12-31	67
2002-03-31	67
2002-06-30	182
2002-09-30	115
2002-12-31	89
2003-03-31	65
2003-06-30	83
2003-09-30	63
2003-12-31	68
2004-03-31	92
2004-06-30	51
2004-09-30	36
2004-12-31	102
2005-03-31	79
2005-06-30	102
2005-09-30	81
2005-12-31	72
2006-03-31	69
2006-06-30	83
2006-09-30	90
2006-12-31	104
2007-03-31	108
2007-06-30	177
2007-09-30	200
2007-12-31	297
2008-03-31	465
2008-06-30	643
2008-09-30	634
2008-12-31	917
2009-03-31	966
2009-06-30	902
2009-09-30	732
2009-12-31	635
2010-03-31	626
2010-06-30	724
2010-09-30	728
2010-12-31	1354
2011-03-31	471
2011-06-30	501
2011-09-30	695
2011-12-31	605
2012-03-31	657
2012-06-30	571
2012-09-30	457
2012-12-31	517
2013-03-31	477
2013-06-30	356
2013-09-30	342
2013-12-31	438
2014-03-31	452
2014-06-30	520
2014-09-30	541
2014-12-31	523
2015-03-31	589
2015-06-30	458
2015-09-30	376
2015-12-31	323
2016-03-31	308
2016-06-30	345
2016-09-30	217
2016-12-31	226
2017-03-31	171
2017-06-30	148
2017-09-30	121
2017-12-31	151
2018-03-31	163
2018-06-30	81
2018-09-30	125
2018-12-31	129
2019-03-31	96
2019-06-30	113
2019-09-30	107
2019-12-31	107
2020-03-31	140
2020-06-30	91
2020-09-30	101
2020-12-31	94
2021-03-31	68
2021-06-30	62
2021-09-30	47
2021-12-31	77
2022-03-31	70
2022-06-30	85
2022-09-30	79
2022-12-31	83
2023-03-31	68
2023-06-30	60
2023-09-30	61